Quote:
Originally Posted by Alex KL-1
Good observation.
Too many coincidences with too many observations led me to believe that (along with some other technicians frinds of mine), even after talking with a colleague that is from a sector near the operators here in the Itaipu DAM (where I work, but at other sector not related to this). He is not a authority in this subject, but he explained at that time the same explanation in this page you mention here, that the ONS here (National Electric System Operator; Operador Nacional do Sistema Elétrico in Brazilian Portuguese) enforces exactly mean 60Hz in long run, but I didn'd see a graph for the long run, and I wondered if in a month the national grid deviated slight above 60Hz mean.
In short run, frequency is subject to some variations due to various demands.
And I talked with him about this same subject of clocks at that time, but he believe that all clocks being bad filtered etc.
Perhaps I need to ask to an actual operator about this subject.
Of course, is not possible to cathegorize my clock being ultra scientific accurate (more professional measuring is needed). And, of course, most other ones have paltry filtering.
That's correct, is a belief, to be yet checked with some more professional work (or to find one already made); maybe the more correct sentence here is: "I strongly believe that in practice this"...
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Time flies, but last week I talked with a actual system operator, and he responded that the actual brazilian grid is only based in the instantaneous 60Hz "target", ie, if it spends some time above (eg: 60.01Hz) for example, it will NOT be compensated after, it only will return ASAP to 60.000Hz (and can stays for some moments above or below, for not crashing the national grid system). The crashings are more priority than the absolute frequency in these situations (and makes sense). He also mentioned a different compensating system than the one from Holland was applied for some time here years ago, but it only compensates for all year deviation in only one day (and he was aware about the Holland system, but he don't know if it is working these present days). Unnecessary to say, the annual correction is useless for home users, since for sure some power outage will occur during 365 days...